When they agreed to Zukhar sitting at the back of he hall, I asked Petra, 'But won't he still be able to affect Viktor?' She responded, 'oh no. The force weakens the further away you are. Who could have known she knew the Inverse Square Law?'

There is a lexicon of 'plays' known to any decent footballer, as premeditated as the Ruy Lopez opening,
the Petroff Defence, The Sicilian Defence, The Muzio Gambit, The Queen's Gambit Declined."

Broadcast 9th January 1971. from the book: 'Letters from America 1969-1979' by Alistair Cooke (Penguin 1979).

(not yet finished the book, I'm just getting to Watergate. There maybe more references of chess to come.
The '72 match, Fischer's abdication, Korchnoi's defection and the yogurt protestation happened during that period.)

The cartoon is of two knights, one black and one white; unable to communicate with each other - although close together; marooned in just 4 squares of a chess board unable to escape. It seems to me apposite for Brexit and the Conservative party contest.